1398518 has 12 divisors (see below), whose sum is σ = 2306220. Its totient is φ = 635580.

The previous prime is 1398517. The next prime is 1398521. The reversal of 1398518 is 8158931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2648 + ... + 3131.

It is an arithmetic number, because the mean of its divisors is an integer number (192185).

2^1398518 is an apocalyptic number.

1398518 is a deficient number, since it is larger than the sum of its proper divisors (907702).

1398518 is a wasteful number, since it uses less digits than its factorization.

1398518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5803 (or 5792 counting only the distinct ones).

The product of its digits is 8640, while the sum is 35.

The square root of 1398518 is about 1182.5895314943. The cubic root of 1398518 is about 111.8294065330.

The spelling of 1398518 in words is "one million, three hundred ninety-eight thousand, five hundred eighteen".